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239321

Sigma-Aldrich

Sulfito de sodio

ACS reagent, ≥98.0%

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About This Item

Fórmula lineal:
Na2SO3
Número de CAS:
7757-83-7
Peso molecular:
126.04
Número CE:
231-821-4
Número MDL:
MFCD00003503
Código UNSPSC:
12352302
ID de la sustancia en PubChem:
329752528
NACRES:
NA.21
Ensayo:
≥98.0%
grado:
ACS reagent
Formulario:
powder or crystals
solubilidad:
water: soluble 126 g/L at 20 °C

grado

ACS reagent

Nivel de calidad

200

Agency

suitable for SM 5210

Ensayo

≥98.0%

Formulario

powder or crystals

impurezas

Free acid, passes test
≤0.005% insolubles
≤0.03 meq/g Titr. free base

pH

9.0-10.5 (25 °C, 126 g/L)

solubilidad

water: soluble 126 g/L at 20 °C

trazas de anión

chloride (Cl-): ≤0.02%

trazas de catión

Fe: ≤0.001%
heavy metals (as Pb): ≤0.001%

cadena SMILES

[Na+].[Na+].[O-]S([O-])=O

InChI

1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2

Clave InChI

GEHJYWRUCIMESM-UHFFFAOYSA-L

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Descripción general

Sodium sulfite is a water-soluble inorganic salt that is commonly used as a reducing agent. It is also used for sulfonation and sulfomethylation reactions. Additionally, it is used in the textile industry as a bleaching, de-sulfurizing, and dechlorinating agent. As an oxygen and free chlorine scavenger, Na2SO3 is employed in the water treatment process. Sodium sulfite participates in the purification and isolation of aldehydes and ketones by forming adducts with them. Other uses include the production of sodium thiosulfate, detergents, and dyes.

Aplicación

Sodium sulfite can be used:
  • As a reducing agent in the hydroxylation of arylboronic acids and arylboronic esters into corresponding phenols.
  • In the transformation of α-amino alcohol methanesulfonate hydrochlorides to sodium α-amino alkanesulfonates.
  • As a SO2 precursor in the multigram synthesis of DABCO·(SO2)2 abbreviated as DABSO.

Código de clase de almacenamiento

13 - Non Combustible Solids

Clase de riesgo para el agua (WGK)

WGK 1

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

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Certificados de análisis (COA)

Lot/Batch Number
0000413682
0000413682
MKCX1378
0000382205
0000382205

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New plasticizers for wheat gluten films.
Irissin-Mangata J, et al.
European Polymer Journal, 37(8), 1533-1541 (2001)
Reaction kinetics of sodium sulfite oxidation by the rapid-mixing method.
Barron CH and O'Hern HA.
Chemical Engineering Science, 21(5), 397-404 (1966)
Amber R Boles et al.
Biotechnology and bioengineering, 109(3), 637-646 (2011-10-22)
A novel sulfur-utilizing perchlorate reducing bacterial consortium successfully treated perchlorate (ClO₄⁻) in prior batch and bench-scale packed bed reactor (PBR) studies. This study examined the scale up of this process for treatment of water from a ClO ₄⁻ and RDX contaminated
Yisu Han et al.
ACS chemical biology, 14(4), 619-635 (2019-03-09)
APEX is an engineered peroxidase that catalyzes the oxidation of a wide range of substrates, facilitating its use in a variety of applications from subcellular staining for electron microscopy to proximity biotinylation for spatial proteomics and transcriptomics. To further advance
Qiang Yang et al.
Bioresource technology, 126, 336-340 (2012-11-06)
Agave americana is one of commonly grown agave species but currently less valuable because its large flower stalk cannot be used for producing alcoholic beverage. In the present study, the stalk was pretreated with dilute acid (DA), sulfite (SPORL), and
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